"Dirty Bomb" is the tenth episode of the first season of Numb3rs.
A truck of nuclear materials is stolen by terrorists who intend to use the materials to make a bomb which would then be used on the city of LA. Only Charlie and the Eppes' father Alan can save the city from a small nuclear blast.
Title
- This term refers to an explosive, usually a nuclear device, intend to cause maximum levels of radiation sickness and to contaminate the environment as much as possible.